This PR adds first set of machine files for E3SM machine Compy. Machine
files for compilers Intel, gnu and PGI are added. I have used the
following test to compile and run the model:

SMS.ne4_ne4.FC5AV1C-L

For the above test:
-Intel compiler works fine
-GNU 4.8.5: Land model has a compile time error
-PGI: Netcdf is not built with this compiler yet

[BFB]

gnu compiler builds fine but blows up during run time with
following error:

set_time_float_from_date: error return from ESMF_TimeSet
for set_time_float_from_date
ERROR: CHKRC

[BFB] - Bit-For-Bit

[BFB] - Bit-For-Bit